Move IndexedDBContext into the StoragePartition and ensure isolation.

chrome/browser/extensions/data_deleter.h

Index: chrome/browser/extensions/data_deleter.h
diff --git a/chrome/browser/extensions/data_deleter.h b/chrome/browser/extensions/data_deleter.h
index 6a87c3c234aba6f6d7d728fd4cd6916faa856c1b..25b942d3c9e0a4a925236be54bb9135064992ad9 100644
--- a/chrome/browser/extensions/data_deleter.h
+++ b/chrome/browser/extensions/data_deleter.h
@@ -74,8 +74,7 @@ class DataDeleter : public base::RefCountedThreadSafe<
 
   // Deletes indexed db files for the extension. May only be called on the
   // webkit thread.
-  void DeleteIndexedDBOnWebkitThread(
-      scoped_refptr<content::IndexedDBContext> indexed_db_context);
+  void DeleteIndexedDBOnWebkitThread();
 
   // Deletes filesystem files for the extension. May only be called on the
   // file thread.
@@ -102,6 +101,8 @@ class DataDeleter : public base::RefCountedThreadSafe<
 
   scoped_refptr<fileapi::FileSystemContext> file_system_context_;
 
+  scoped_refptr<content::IndexedDBContext> indexed_db_context_;
+
   // If non-empty, the extension we're deleting is an isolated app, and this
   // is its directory which we should delete.
   FilePath isolated_app_path_;